gdb-arm-none-eabi software package provides GNU debugger for ARM Cortex-A/R/M processors, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gdb-arm-none-eabi
gdb-arm-none-eabi is installed in your system.
Make ensure the gdb-arm-none-eabi package were installed using the commands given below,
$ sudo dpkg-query -l | grep gdb-arm-none-eabi *
You will get with gdb-arm-none-eabi package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Development |
| Package | gdb-arm-none-eabi |
| Version | 7.7.1+dfsg-3+6+b1 [s390x], 7.7 |
| Description | GNU debugger for ARM Cortex-A/R/M processors |
| Sub Section | Devel |